AM-94-49 TEN MILLION MILE LUBRICANT FIELD TEST

Description:

This paper is a follow-up to the 1992 paper, and presents a final report on the field test, which now encompasses a used oil data base covering 16,000,000 km (10,000,ooO miles) of commercial experience with both regular and low sulfur diesel fuel. Trucks operating on all four combinations of fuel sulfur and oil technology showed excellent field performance, with indicated oil economy for the fleet exceeding 4,000 km/l at engine lives approaching or exceeding 1, OOO,OOkOm (600,000 rni). It would appear that the optimum oil for piston deposit control with either regular or low sulfur diesel fuel was the premium commercial API CF-4/SG oil with 1 mass % sulfated ash. As we look to the future, when exhaust catalysts or traps may be required, the 0.5 mass % sulfated ash lubricant offers the potential of enhanced after treatment life (2) with acceptable deposit and wear control with either regular or low sulfur diesel fuel, which is now common-place.